Network Security and Firewall

Network Security and Firewall

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  Network Security &Firewall Shafeeqa Farsana
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  Contents • Security threats •Network security • Types of network security • Firewall • Importance of network security This Photo by Unknown author is licensed under CC BY.
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  Security Threats Security threat isdefined as a risk that which can potentially harm computer systems and organization. It can lead to loss or corruption of data or physical damage to the hardware and/or infrastructure. This Photo by Unknown author is licensed under CC BY.
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  Network Security Network security coversmultitude of technologies, devices and processes. It is a set of rules and configurations designed to protect the integrity, confidentiality and accessibility of computer networks and data using both software and hardware technologies. This Photo by Unknown author is licensed under CC BY.
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  How does it work? Authenticationand Authorization Authentication checks and verifies that it is indeed the user belonging to the network who is trying to access or enter it, thereby preventing unauthorized intrusions. Authorization is the level of access to be provided to the recently authenticated user. The admin of the network needs access to the entire network, whereas those working within it probably need access to only certain areas within the network. This Photo by Unknown author is licensed under CC BY.
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  Network Security Controls Physical networksecurity Technical network security Administrative network security This Photo by Unknown author is licensed under CC BY.
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  Types of Network Security NetworkAccess Control Antivirus and Antimalware Software Virtual Private Networks Security Information and Event Management System Mobile Device Management Firewall This Photo by Unknown author is licensed under CC BY.
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  Firewall A firewall isa network security device that monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules. Its purpose is to establish a barrier between the internal network and incoming traffic from external sources in order to block malicious traffic like viruses and hackers. This Photo by Unknown author is licensed under CC BY.
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  Types of Firewall Packetfiltering Circuit level gateway implementation Acting as proxy server Web application firewall This Photo by Unknown author is licensed under CC BY.
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  Importance of Network Security Lackof trust in the privacy and eCommerce security Malware, viruses, and frauds Uncertainty and complexity in online transactions This Photo by Unknown author is licensed under CC BY.